How can I vectorise a nested for loop that uses a function?

So I have a function that takes 3 inputs, a 2D array and the row and column position of an element within that array. It outputs a new 2D array with the specified element updated. I need to write a script that uses this function to perform calculations on every element within the array.

Right now my code looks like this:

for i = 1:size(array,1)
    for j = 1:size(array,2)
        newarray(i,j) = MyFunction(array,i,j)      
    end
end

Now this works perfectly fine, but I was wondering if it is possible to do this without the loops to increase performance and how would I do this?

[Cedric]

There is no better way of doing this than to make the function able to treat vector/array inputs. What is this function doing?